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1991 Chevrolet Blazer
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Lifetime Replacement
1991 Chevrolet Blazer

1991 Chevrolet Blazer Transmission Control Modules

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GM Original Equipment Series Transmission Control Module - Direct Fit, Sold individually
AC Delco®
GM Original Equipment Series Transmission Control Module - Direct Fit, Sold individually
Part Number: AC21693
Guaranteed to Fit
$1,625.99
Vehicle Fitment
  • 1991 Chevrolet Blazer Silverado 8 Cyl 6.2L Automatic Transmission, With OE # 16147609
  • 1991 Chevrolet Blazer Scottsdale 8 Cyl 6.2L Automatic Transmission, With OE # 16147609
Product Details
Notes : Vehicle specific flash programming required on or off the vehicle; Accurate vim and mileage are required; Additional vehicle specific on-car programming must be performed after installation to prevent drivability and starting issuesWarranty : 24-months or unlimited mile AC Delco limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Condition : RemanufacturedSeries : GM Original Equipment SeriesProduct Fit : Direct Fit
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Product Questions & Answers

AC Delco GM Original Equipment Series Transmission Control Module - Direct Fit, Sold individually
$1625.99
Q:Does the 1993 tcm for 6.5 diesel automatic transmission need programing or just changing the Prom? Show Less
Tom D.
A:BEST ANSWERHi Tom, thank you for reaching out. Yes, it requires programming. You can use the link below to order this module while stocks last. Have a good one! https://www.carparts.com/transmission-control-module/ac-delco/ac21693?can=cpab2020_csqa_20221129 Show less
Andrew B.
 
1 Question, 1 AnswerView all Q&As >

Helpful Automotive Resources

What Does Resetting the Transmission Module Do? How and When to Reset
What Does Resetting the Transmission Module Do? How and When to ResetBad connections could affect the module and cause transmission issues. Reverting the TCM to its factory settings could eliminate the problems they caused.
P0729 Code: Gear 6 Incorrect Ratio
P0729 Code: Gear 6 Incorrect RatioNewer vehicles often have more than four gear ratios for better fuel economy. The control modules also determine when to shift up or down between gears depending on various data, such as throttle position and vehicle speed.
Why Do EVs Have Fake Engine Noise?
Why Do EVs Have Fake Engine Noise?EVs and internal combustion engine vehicles generally use powertrain data to make the sound emulate the increasing pitch of engine revs and the drops in tone during a gear shift.
Is Your Car Stuck In Neutral? Here’s Why
Is Your Car Stuck In Neutral? Here’s WhyThe transmission fluid is also responsible for performing these duties: Transferring power in the torque converterProviding hydraulic pressure in clutches and servosLubricating bearings, bushings, and gearsTransferring heat to cool transmission partsProviding the correct friction for clutch and band operation
P0700: Transmission Control System (MIL Request)
P0700: Transmission Control System (MIL Request)The TCM monitors the sensors and actuators in the transmission system and sends the data to the PCM. This module monitors the throttle speed sensor, motor speed sensor, and output shaft speed sensor. Once the module detects something wrong with the transmission controls, it’ll trigger the P0700 code.
P0763 Code: Shift Solenoid C Electrical
P0763 Code: Shift Solenoid C ElectricalTo change gears, the automatic transmission uses bands and clutches, which are activated by having fluid pressure in the right place at the right time. Transmission solenoids are in charge of opening and closing valves in the valve body to allow transmission fluid to flow to the clutches and bands.